Convertible hat



FIG. 1 is a rear perspective view of a convertable hat showing my new design in an open extended position;

FIG. 2 is a rear perspective view thereof in an open folded position;

FIG. 3 is a perspective view in a closed extended position; and,

FIG. 4 is a top plan view of FIG. 2. 

The ornamental design for a convertible hat, as shown and described. 